\vsssub
\subsubsection{The grid preprocessor} \label{sub:ww3grid}
\vsssub

\proddefH{ww3\_grid}{w3grid}{ww3\_grid.ftn}
\proddeff{Input}{ww3\_grid.nml}{Namelist configuration file.}{10} (App.~\ref{sec:config012})
\proddefa{ww3\_grid.inp}{Traditional configuration file.}{10} (App.~\ref{sec:config011})
\proddefa{'grid file' \opt}{File with bottom depths.}{user}
\proddefa{'obstr. file' \opt}{File with sub-grid obstructions. }{user}
\proddefa{'mask file' \opt}{File with grid mask. }{user}
\proddeff{Output}{standard out}{Formatted output of program.}{6}
\proddefa{mod\_def.ww3}{Model definition file in \ws\ format.}{20}
\proddefa{mask.ww3 \opt}{Land-sea mask file (switch {\F o2}a).}{20}
\proddeff{Scratch}{ww3\_grid.scratch}{Formatted scratch file.}{90}

\vspace{\baselineskip} \noindent
Note that bottom and obstruction data may be in same file.

\pb
